Don't you realize most of the startup promotional videos are boring? Its always the same, cartoons, 2D, introducing something or someone...I know most of startups can't afford to pay a lot for a promo video. But I don't think it is necessary to spend so much money. Actually, there are a lot of young production companies or young talent who are pleased to make a wonderful film.
Here are some examples of a good-quality video, some of them they could be TV commercials.